I work as a teacher. I can plan lessons as much as I like (and today I'm planning for an observed lesson next week or week after) but I can tell you, something

I work as a teacher. I can plan lessons as much as I like (and today I'm planning for an observed lesson next week or week after) but I can tell you, something unexpected always happens in the actual lesson. The plan lasts 20 minutes if that. The rest is 'reflection in action' to quote Schon.